156009997 has 8 divisors (see below), whose sum is σ = 183284640. Its totient is φ = 130917360.

The previous prime is 156009941. The next prime is 156010031. The reversal of 156009997 is 799900651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 156009997 - 2⁷ = 156009869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156009097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545347 + ... + 545632.

It is an arithmetic number, because the mean of its divisors is an integer number (22910580).

Almost surely, 2^156009997 is an apocalyptic number.

It is an amenable number.

156009997 is a deficient number, since it is larger than the sum of its proper divisors (27274643).

156009997 is a wasteful number, since it uses less digits than its factorization.

156009997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091003.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 156009997 is about 12490.3961906739. The cubic root of 156009997 is about 538.3327601034.

The spelling of 156009997 in words is "one hundred fifty-six million, nine thousand, nine hundred ninety-seven".